442665756 has 144 divisors (see below), whose sum is σ = 1262553600. Its totient is φ = 134042688.

The previous prime is 442665733. The next prime is 442665761. The reversal of 442665756 is 657566244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1441755 + ... + 1442061.

Almost surely, 2^442665756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442665756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (631276800).

442665756 is an abundant number, since it is smaller than the sum of its proper divisors (819887844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442665756 is a wasteful number, since it uses less digits than its factorization.

442665756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 404 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 442665756 is about 21039.6234757184. The cubic root of 442665756 is about 762.1234222549.

The spelling of 442665756 in words is "four hundred forty-two million, six hundred sixty-five thousand, seven hundred fifty-six".